Rappa is a playable character in Honkai: Star Rail.
A peculiar girl who appears in Penacony like a flashbang at the darkest hour of night, identifying herself as a ninja and attributing everything in the world to "ninjutsu." Upholding the recitation of ninja mantra, creating Dazzling Ninja Seals, and mastering ninja techniques, the Way of the Ninja involves rap, graffiti, and comics. Through rigorous self-discipline, she roams the stars, upholding justice and righteousness. A Galaxy Ranger.